could achieve
Regular verb: achieve - achieved- achieved

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could achieve
you could achieve
she could achieve
we could achieve
you could achieve
they could achieve 	I could be achieving
you could be achieving
she could be achieving
we could be achieving
you could be achieving
they could be achieving	I could have achieved
you could have achieved
she could have achieved
we could have achieved
you could have achieved
they could have achieved	I could have been achieving
you could have been achieving
she could have been achieving
we could have been achieving
you could have been achieving
they could have been achieving	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not achieve
you could not achieve
she could not achieve
we could not achieve
you could not achieve
they could not achieve 	I could not be achieving
you could not be achieving
she could not be achieving
we could not be achieving
you could not be achieving
they could not be achieving	I could not have achieved
you could not have achieved
she could not have achieved
we could not have achieved
you could not have achieved
they could not have achieved	I could not have been achieving
you could not have been achieving
she could not have been achieving
we could not have been achieving
you could not have been achieving
they could not have been achieving	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I achieve?
could you achieve?
could she achieve?
could we achieve?
could you achieve?
could they achieve? 	could I be achieving?
could you be achieving?
could she be achieving?
could we be achieving?
could you be achieving?
could they be achieving? 	could I have achieved?
could you have achieved?
could she have achieved?
could we have achieved?
could you have achieved?
could they have achieved? 	could I have been achieving?
could you have been achieving?
could she have been achieving?
could we have been achieving?
could you have been achieving?
could they have been achieving? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not achieve?
could you not achieve?
could she not achieve?
could we not achieve?
could you not achieve?
could they not achieve? 	could I not be achieving?
could you not be achieving?
could she not be achieving?
could we not be achieving?
could you not be achieving?
could they not be achieving? 	could I not have achieved?
could you not have achieved?
could she not have achieved?
could we not have achieved?
could you not have achieved?
could they not have achieved? 	could I not have been achieving?
could you not have been achieving?
could she not have been achieving?
could we not have been achieving?
could you not have been achieving?
could they not have been achieving?